mirror of
https://github.com/gnif/LookingGlass.git
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ac3677d9ae
This uses the same line sweep algorithm originally created to copy DXGI textures to IVSHMEM to implement the copy from IVSHMEM to memory-mapped pixel buffer objects.
132 lines
3.4 KiB
C
132 lines
3.4 KiB
C
/**
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* Looking Glass
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* Copyright © 2017-2021 The Looking Glass Authors
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* https://looking-glass.io
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc., 59
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* Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "texture.h"
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#include <assert.h>
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#include "texture_buffer.h"
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#include "common/debug.h"
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#include "common/KVMFR.h"
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#include "common/rects.h"
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struct TexDamage
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{
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int count;
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FrameDamageRect rects[KVMFR_MAX_DAMAGE_RECTS];
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};
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typedef struct TexFB
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{
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TextureBuffer base;
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struct TexDamage damage[EGL_TEX_BUFFER_MAX];
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}
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TexFB;
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static bool eglTexFB_init(EGL_Texture ** texture, EGLDisplay * display)
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{
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TexFB * this = calloc(sizeof(*this), 1);
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*texture = &this->base.base;
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EGL_Texture * parent = &this->base.base;
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if (!eglTexBuffer_init(&parent, display))
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{
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free(this);
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*texture = NULL;
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return false;
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}
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for (int i = 0; i < EGL_TEX_BUFFER_MAX; ++i)
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this->damage[i].count = -1;
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return true;
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}
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static bool eglTexFB_update(EGL_Texture * texture, const EGL_TexUpdate * update)
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{
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TextureBuffer * this = UPCAST(TextureBuffer, texture);
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TexFB * fb = UPCAST(TexFB, this);
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assert(update->type == EGL_TEXTYPE_FRAMEBUFFER);
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LG_LOCK(this->copyLock);
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struct TexDamage * damage = fb->damage + this->bufIndex;
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bool damageAll = !update->rects || update->rectCount == 0 || damage->count < 0 ||
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damage->count + update->rectCount > KVMFR_MAX_DAMAGE_RECTS;
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if (damageAll)
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framebuffer_read(
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update->frame,
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this->buf[this->bufIndex].map,
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this->format.stride,
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this->format.height,
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this->format.width,
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this->format.bpp,
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this->format.stride
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);
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else
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{
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memcpy(damage->rects + damage->count, update->rects,
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update->rectCount * sizeof(FrameDamageRect));
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damage->count += update->rectCount;
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rectsFramebufferToBuffer(
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damage->rects,
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damage->count,
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this->buf[this->bufIndex].map,
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this->format.stride,
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this->format.height,
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update->frame,
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this->format.stride
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);
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}
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this->buf[this->bufIndex].updated = true;
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for (int i = 0; i < EGL_TEX_BUFFER_MAX; ++i)
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{
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struct TexDamage * damage = fb->damage + i;
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if (i == this->bufIndex)
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damage->count = 0;
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else if (update->rects && update->rectCount > 0 && damage->count >= 0 &&
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damage->count + update->rectCount <= KVMFR_MAX_DAMAGE_RECTS)
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{
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memcpy(damage->rects + damage->count, update->rects,
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update->rectCount * sizeof(FrameDamageRect));
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damage->count += update->rectCount;
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}
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else
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damage->count = -1;
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}
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LG_UNLOCK(this->copyLock);
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return true;
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}
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EGL_TextureOps EGL_TextureFrameBuffer =
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{
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.init = eglTexFB_init,
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.free = eglTexBuffer_free,
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.setup = eglTexBuffer_stream_setup,
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.update = eglTexFB_update,
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.process = eglTexBuffer_stream_process,
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.bind = eglTexBuffer_stream_bind
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};
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